发明名称 |
DEVICE AND METHOD FOR REPRODUCING DATA FROM DISK, METHOD FOR CONTROLLING ROTATION OF DISK, AND REPRODUCTION CLOCK GENERATING DEVICE |
摘要 |
<p>A virtual RAM read address generating circuit (41) generates a virtual address on the basis of an output signal of a crystal oscillation circuit (36). A phase comparison circuit (39) which performs phase comparison with a write address, and a spindle control circuit (3) which controls rotation of a disk with reference to outputs of a frequency comparison circuit (38) and the phase comparison circuit (39) are disposed. Therefore, a phase error can be fed back to a spindle motor, thereby preventing linear velocity deviation from occurring in a steady state. By using the thus configured reproducing device, the reproduction quality in the case where a disk wherein recording was performed by the CLV system is reproduced by the variable linear velocity reproduction system is ensured, and both high-speed access and low power consumption are realized. <IMAGE></p> |
申请公布号 |
EP0768660(A1) |
申请公布日期 |
1997.04.16 |
申请号 |
EP19960905016 |
申请日期 |
1996.03.07 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KOUDO, TOSHIKAZU;IMURA, MASAHARU;KUNO, YOSHIKI;MASHIKO, YASUHISA;ISHIBASHI, HIDEFUMI |
分类号 |
G11B19/247;G11B20/10;G11B20/14;G11B27/10;G11B27/11;G11B27/30;G11B27/32;H03L7/08;(IPC1-7):G11B19/247 |
主分类号 |
G11B19/247 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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